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SIG SAUER MCX 5.56 Nato Upper Receiver

EDEMO SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP, EDEMO2
SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP
Upper Receiver MCX
EDEMO SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP, EDEMO2
EDEMO SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP, EDEMO2
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EDEMO SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP, EDEMO2
SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP
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SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP
Upper Receiver MCX
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Upper Receiver MCX
EDEMO SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP, EDEMO2
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EDEMO SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP, EDEMO2

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Questions & Answers
does this come with trigger pack and BCG, ready to pop on my MCX rattler lower? Expert Answer

Unfortunately, this upper only comes with certain parts. The trigger group and adapters are not included as this is Sig Sauer's world sku. It will come with the upper with the typical parts, deflector assembly/handguard/gas block, as well as including the bolt carrier group.

by Kurt Colbourne, Gear Expert, January 25, 2023
See 2 More Answers
Is this the AR15 conversion or just the upper? Picture shows conversion parts but description of contents just say "upper." Conversion parts incl? Expert Answer

This SIG SAUER MCX 5.56 Nato Upper Receiver is just the upper. It does not include the stock adapter or trigger.

by Ethan, Gear Expert, February 9, 2023
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Sig MCX upper by Taylor, Verified Owner, January 27, 2023
This is a great product from Sig but it is over priced for just a upper receiver with out the adapter, trigger or the folding hinge apdater. The description states it comes with all the adapters and trigger but it doesnt. Buyers beware.
1/1 found this helpful
Helpful Positive Review
cleanest running AR upper. by 11BGrunt, December 24, 2021
I got it for my Rattler to shoot 556, however it comes with everything needed to build another AR IF you have a receiver. So that’s what I’m going to do in the future to add a second piston AR to my collection. If you are planning to build an 11” AR...
Read More...
1/1 found this helpful
Most Recent Reviews
Not As Advertized by The MC, Verified Owner, August 8, 2022
This is an indifferent review. I cannot write a review for this product because the one i received did not have anything but the upper. No trigger or adapters. I caj that the stock virtus trigger is good, but not a G. The 11.5 itself is a good upper ...
Read More...
0/2 found this helpful
Read All 3 Reviews
Caliber:
5.56x45mm NATO
Color:
Black
Condition:
Factory DEMO

Code: SD9-UFH-AFF6D843-WUAMCX-11B-556-BLK-TAP-DEMO

MPN: WUAMCX-11B-556-BLK-TAP-DEMO

Product No Longer Available

Product Info for SIG SAUER MCX 5.56 Nato Upper Receiver

SIG SAUER MCX 5.56 Nato Upper Receiverimage

Package Contents:

  • SIG SAUER MCX 5.56 Nato Upper Receiver

Ammunition

1–39 / 39
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Best Rated
PMC Ammunition X-TAC, 5.56x45mm NATO, 55 grain, Full Metal Jacket, Brass, Centerfire Rifle Ammo, 20, 556X
PMC Ammunition X-TAC, 5.56x45mm NATO, 55 grain, Full Metal Jacket, Brass, Centerfire Rifle Ammo, 20, 556X
(67)
List: $15.99 (Save 25%)
$11.99
$0.60/Round
On Sale
PMC Ammunition X-TAC Light Armor Piercing 5.56x45mm NATO 62 Grain Brass Cased Centerfire Rifle Ammunition
PMC Ammunition X-TAC Light Armor Piercing 5.56x45mm NATO 62 Grain Brass Cased Centerfire Rifle Ammunition
(113)
As Low As (Save Up to 21%)
$11.89
$0.59/Round
See all 2 models
Best Rated
Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition
Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition
(26)
As Low As (Save Up to 29%)
$25.99
$1.30/Round
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Best Rated
Winchester USA 5.56x45mm NATO 62 grain Green Tip M855 Full Metal Jacket Boat Tail FMJBT Brass Centerfire Rifle Ammunition
Winchester USA 5.56x45mm NATO 62 grain Green Tip M855 Full Metal Jacket Boat Tail FMJBT Brass Centerfire Rifle Ammunition
(133)
As Low As (Save Up to 54%)
$12.99
$0.61 - $0.82/Round
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Freedom Munitions 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
Freedom Munitions 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
(3)
As Low As (Save Up to 19%)
$26.99
$0.54 - $0.58/Round
See all 2 models
Best Rated
Hornady Superformance 5.56x45mm NATO 75 grain Boat-Tail Hollow Point Match Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81264
Hornady Superformance 5.56x45mm NATO 75 grain Boat-Tail Hollow Point Match Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81264
(8)
List: $41.40 (Save 26%)
$30.79
$1.54/Round
Best Rated
Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition
Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition
(147)
As Low As (Save Up to 52%)
$13.49
$0.67 - $0.76/Round
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Federal American Eagle 5.56x45mm NATO 55 Grain Full Metal Jacket Boat Tail Brass Cased Rifle Ammunition
Federal American Eagle 5.56x45mm NATO 55 Grain Full Metal Jacket Boat Tail Brass Cased Rifle Ammunition
As Low As (Save Up to $16.00)
$80.99
$0.78 - $0.81/Round
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Best Rated
Hornady Frontier 5.56x45mm NATO 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR310
Hornady Frontier 5.56x45mm NATO 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR310
(15)
List: $19.60 (Save 13%)
$16.99
$0.85/Round
Hornady Frontier 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Rifle Ammunition
Hornady Frontier 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Rifle Ammunition
(2)
As Low As (Save Up to 18%)
$14.49
$0.72/Round
See all 2 models
Best Rated
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 70 Grain, 20 - Rounds, *31191
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 70 Grain, 20 - Rounds, *31191
(14)
List: $43.99 (Save 10%)
$39.49
$1.97/Round
Best Rated
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 62 Grain, 20 - Rounds, *31190
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 62 Grain, 20 - Rounds, *31190
(10)
List: $42.99 (Save 16%)
$35.99
$1.80/Round
Fort Scott Munitions, 5.56x45mm NATO, 55 grain, Copper Solid, Brass, Centerfire Rifle Ammo, 20, 556-055-SCV
Fort Scott Munitions, 5.56x45mm NATO, 55 grain, Copper Solid, Brass, Centerfire Rifle Ammo, 20, 556-055-SCV
List: $28.32 (Save 10%)
$25.39
$1.27/Round
Fort Scott Munitions .5.56 NATO 40 Grain CNC Machined Copper Brass Rifle Ammo, 20 Rounds, 556-040-SCV2
Fort Scott Munitions .5.56 NATO 40 Grain CNC Machined Copper Brass Rifle Ammo, 20 Rounds, 556-040-SCV2
List: $28.06 (Save 10%)
$25.19
$1.26/Round
AmmoDyn 5.56x45mm NATO 55 grain Full Metal Jacket Brass Cased Rifle Ammo, 30 Rounds, PM-55655-30
AmmoDyn 5.56x45mm NATO 55 grain Full Metal Jacket Brass Cased Rifle Ammo, 30 Rounds, PM-55655-30
List: $26.95 (Save 16%)
$22.59
$0.75/Round
On Sale
Barnes Precision 5.56x45mm NATO 85 grain Burner Open Tip Match Boat Tail Centerfire Rifle Ammo, 20 Rounds, *30848
Barnes Precision 5.56x45mm NATO 85 grain Burner Open Tip Match Boat Tail Centerfire Rifle Ammo, 20 Rounds, *30848
(5)
List: $42.99 (Save 20%)
$34.29
$1.71/Round
Barnes Precision MatchRifle Cartridges, 5.56x45mm NATO, Match Burner Open Tip Match Boat Tail, 69 Grain, 20 - Rounds, *30846
Barnes Precision MatchRifle Cartridges, 5.56x45mm NATO, Match Burner Open Tip Match Boat Tail, 69 Grain, 20 - Rounds, *30846
List: $42.99 (Save 16%)
$35.99
$1.80/Round
On Sale
Hornady Superfomance 5.56 Nato 55 Grain Copper Solid CX Brass Cased Centerfire Rifle Ammo, 20 Rounds, 812544
Hornady Superfomance 5.56 Nato 55 Grain Copper Solid CX Brass Cased Centerfire Rifle Ammo, 20 Rounds, 812544
(4)
List: $46.61 (Save 36%)
$29.69
$1.48/Round
On Sale
Prvi Partizan RangeMaster, 5.56 NATO, 55 Grain, Full Metal Jacket, 20 Round Box PPRM5561
Prvi Partizan RangeMaster, 5.56 NATO, 55 Grain, Full Metal Jacket, 20 Round Box PPRM5561
List: $23.99 (Save 48%)
$12.49
$0.62/Round
PPU PPRM5561M 5.56X45 55 FMJBT RNGMSTR
PPU PPRM5561M 5.56X45 55 FMJBT RNGMSTR
List: $866.49 (Save $59.00)
$807.49
$0.81/Round
First Breach 5.56 NATO 55 Grain Full Metal Jacket Boattail New C220 Brass Cased Rifle Ammo, 20 Rounds, 556 55 loaded
First Breach 5.56 NATO 55 Grain Full Metal Jacket Boattail New C220 Brass Cased Rifle Ammo, 20 Rounds, 556 55 loaded
(1)
List: $19.99 (Save 38%)
$12.49
$0.62/Round
Hornady Frontier 5.56x45mm NATO 55 Grain Brass Cased Full Metal Jacket Rifle Ammo, 250 Rounds, FR604
Hornady Frontier 5.56x45mm NATO 55 Grain Brass Cased Full Metal Jacket Rifle Ammo, 250 Rounds, FR604
List: $203.99 (Save $16.00)
$187.99
$0.75/Round
Best Rated
Hornady BLACK 5.56x45mm NATO 62 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81263
Hornady BLACK 5.56x45mm NATO 62 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81263
(8)
List: $24.99 (Save $1.50)
$23.49
$1.17/Round
Fort Scott Munitions 5.56 NATO Copper 62 Grain Centerfire Rifle Ammo, 20 Rounds, 556-062-SCV1
Fort Scott Munitions 5.56 NATO Copper 62 Grain Centerfire Rifle Ammo, 20 Rounds, 556-062-SCV1
(2)
List: $47.99 (Save 34%)
$31.49
$1.57/Round
Fort Scott Munitions 5.56 NATO Brass 62 Grain Centerfire Rifle Ammo, 20 Rounds, 556-062-SBV1
Fort Scott Munitions 5.56 NATO Brass 62 Grain Centerfire Rifle Ammo, 20 Rounds, 556-062-SBV1
(2)
List: $47.99 (Save 34%)
$31.49
$1.57/Round
PPU 5.56x45mm NATO 0 grain Brass Cased Blank Ammo, 20 Rounds, PPB556
PPU 5.56x45mm NATO 0 grain Brass Cased Blank Ammo, 20 Rounds, PPB556
List: $22.49 (Save 22%)
$17.49
$0.87/Round
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-556-24
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-556-24
List: $49.99 (Save 23%)
$38.49
$1.92/Round
Best Rated
Hornady Frontier 5.56x45mm NATO 75 grain Boat Tail Hollow Point (BTHP) Brass Centerfire Rifle Ammunition
Hornady Frontier 5.56x45mm NATO 75 grain Boat Tail Hollow Point (BTHP) Brass Centerfire Rifle Ammunition
(29)
As Low As (Save Up to 17%)
$17.99
$0.90/Round
See all 2 models
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Pistol Ammo, 20 Rounds, HMBX-556-25
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Pistol Ammo, 20 Rounds, HMBX-556-25
List: $49.99 (Save 22%)
$38.99
$1.95/Round
Best Rated
Hornady Frontier 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
Hornady Frontier 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
(47)
As Low As (Save Up to 17%)
$13.49
$0.65 - $0.67/Round
See all 3 models
First Breach 5.56 NATO 55 Grain Full Metal Jacket Boattail New C220 Brass Cased Rifle Ammo, 1000 Rounds, 50009
First Breach 5.56 NATO 55 Grain Full Metal Jacket Boattail New C220 Brass Cased Rifle Ammo, 1000 Rounds, 50009
(1)
List: $612.29 (Save $39.80)
$572.49
$0.57/Round
Newly Added
Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77grain Boat Tail Hollow Point Brass Cased Rifle Ammunition
Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77grain Boat Tail Hollow Point Brass Cased Rifle Ammunition
As Low As (Save Up to 10%)
$32.00
$1.60/Round
See all 2 models
PMC 556M55BP Battle Pack 5.56 NATO 62 Gr Light Armor Piercing LAP
PMC 556M55BP Battle Pack 5.56 NATO 62 Gr Light Armor Piercing LAP
(1)
List: $131.99 (Save 30%)
$92.99
$0.77/Round
Magtech 5.56x45mm Ball M193 - 556ACS
Magtech 5.56x45mm Ball M193 - 556ACS
List: $732.00 (Save $65.01)
$666.99
$0.67/Round
PMC Ammunition X-Tac 5.56x45mm NATO 55 Grain Full Metal Jacket Rifle Ammo, Metal Box, 840 Rounds, 1102741
PMC Ammunition X-Tac 5.56x45mm NATO 55 Grain Full Metal Jacket Rifle Ammo, Metal Box, 840 Rounds, 1102741
List: $632.49 (Save $49.50)
$582.99
$0.69/Each
PMC Ammunition X-Tac Rifle Ammo 5.56 NATO 62 gr Green Tip 1000/ct, 5.56 M855 Case
PMC Ammunition X-Tac Rifle Ammo 5.56 NATO 62 gr Green Tip 1000/ct, 5.56 M855 Case
List: $739.99 (Save 13%)
$645.19
$0.65/Round
PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail FMJBT
PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail FMJBT
(1)
List: $179.49 (Save 25%)
$134.99
$0.67/Round
Hornady Frontier 5.56x45mm NATO 55 grain Hollow Point Brass Cased Centerfire Rifle Ammo, 150 Rounds, FR2415
Hornady Frontier 5.56x45mm NATO 55 grain Hollow Point Brass Cased Centerfire Rifle Ammo, 150 Rounds, FR2415
(3)
List: $128.25 (Save 17%)
$105.99
$0.71/Round
Best Rated
Winchester USA 5.56x45mm NATO 55 Grain Full Metal Jacket Centerfire Rifle Ammo, 125 Rounds, USA193125
Winchester USA 5.56x45mm NATO 55 Grain Full Metal Jacket Centerfire Rifle Ammo, 125 Rounds, USA193125
(19)
List: $121.49 (Save 32%)
$82.69
$0.66/Round
Next

Ammo Boxes

1–6 / 6
Previous
Berrys 29682 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Smoke Lid W/Black Bottom
Berrys 29682 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Smoke Lid W/Black Bottom
(1)
List: $6.99 (Save 50%)
$3.49
Berrys 79462 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Clear Lid W/Black Bottom
Berrys 79462 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Clear Lid W/Black Bottom
List: $6.49 (Save 51%)
$3.19
Berrys 86410 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Blue Lid W/Black Bottom
Berrys 86410 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Blue Lid W/Black Bottom
List: $6.99 (Save 21%)
$5.49
Berrys 44661 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Blue Lid W/Black Bottom
Berrys 44661 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Blue Lid W/Black Bottom
List: $6.99 (Save 50%)
$3.49
Berrys 11664 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Smoke Lid W/Black Bottom
Berrys 11664 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Smoke Lid W/Black Bottom
List: $6.99 (Save 21%)
$5.49
MTM Ammo Rack w 4 RS-50-24 Ammo boxes, Dark Earth/Clear Blue, ARRS
MTM Ammo Rack w 4 RS-50-24 Ammo boxes, Dark Earth/Clear Blue, ARRS
(2)
$43.19
Next

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SIG SAUER MCX 5.56 Nato Upper Receiver Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP , MPN: WUAMCX-11B-556-BLK-TAP-DEMO , Code: SD9-UFH-AFF6D843-WUAMCX-11B-556-BLK-TAP-DEMO
  • SIG SAUER MCX Upper Receiver, 5.56 Nato, Black, WUAMCX-11B-556-BLK-TAP , MPN: WUAMCX-11B-556-BLK-TAP , UPC: 798681579372 , Code: SD9-UFH-AFF6D843-WUAMCX-11B-556-BLK-TAP
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Last updated 2026-08-09 UTC.